基于GIS技术的汶川地震诱发地质灾害危险性评价——以四川省北川县为例  

Hazard assessment of geohazards triggered by the Wenchuan earthquake using GIS technology ——Taking Beichuan County of Sichuan Province for example

作　　者：齐信[1] 唐川[1] 铁永波[1] 梁京涛[1] 

机构地区：[1]成都理工大学"地质灾害防治与地质环境保护"国家重点实验室,成都610059

出　　处：《成都理工大学学报（自然科学版）》2010年第2期160-167,共8页Journal of Chengdu University of Technology: Science & Technology Edition

基　　金：国家自然科学基金资助项目(40772206);国家重点基础研究发展计划项目(2008CB425801)

摘　　要：在汶川地震诱发地质灾害应急调查的基础上,开展地震诱发地质灾害危险性评价。以北川县为例,应用GIS技术对5个主要评价指标进行提取和叠加分析,并结合降雨因子最终完成北川县灾后危险性评价图。评价结果表明:高危险区面积占52.6%,地质灾害点占95.9%;中危险区面积占25.1%,地质灾害点占3.7%;低危险区面积占22.3%,地质灾害点占0.4%。This paper discusses the methodology for hazard assessment of geohazards triggered by the Wenchuan Earthquake on 12 May 2008 based on an emergency survey after the shock. The Beichuan County of Sichuan Province is selected as a case study. Five assessment indicators are extracted and overlaid and analysed to assess the landslide susceptibility using GIS technology. The rainfall indicator is overlaid with the landslide susceptibility map to produce the hazard assessment map. The results show that the high-hazard area accounts for 52.6% and the number of geohazards in the study area accounts for 95.9%, the moderate-hazard area accounts for 25.1% and the number of geohazards in this area accounts for 3.7%, the low-hazard area accounts for 22.3% and the number of geohazards in this area accounts for 0. 4%.

关 键 词：汶川地震 地质灾害 危险性评价 地理信息系统 北川县 

分 类 号：P315.9[天文地球—地震学]